Embroidery appliance adapted to be attached to a sewing machine



Feb. 2, 1965 M, FRESARD ETAL 3,168,064

EMBROIDERY APPLIANCE ADAPTED TO BE ATTACHED TO A SEWING MACHINE Filed Oct. 22, 1962 4 Sheets-Sheet 1 I. -z7 78x 45 'm re/rraes M19265 L Pei-I542 D 1965 M. FRESARD ETAL 3,168,064

EMBROIDERY APPLIANCE ADAPTED TO BE ATTACHED TO A SEWING MACHINE Filed on. 22, 1962 4 Sheets-Sheet 2 2, 1965 M. FRESARD ETAL 3,163,064

EMBROIDERY APPLIANCE ADAPTED TO BE ATTACHED TO A SEWING MACHINE 4 Sheets-Sheet 3 Filed Oct. 22, 1962 //VVE/Y TOQS M02654 F'EESA R p FEED 50 (#52.

Feb. 2, 1965 M. FRESARD ETAL 3,168,064

EMBROIDERY APPLIANCE ADAPTED TO BE ATTACHED TO A SEWING MACHINE Filed Oct. 22, 1962 4 Sheets-Sheet 4 //v1/ ,v 7-025 nmece L Peas/9R0 F250 BUCf/ELR.

United States Patent 3,168,064 EMBRQHDERY ATWLEANCE ADAPTED TO BE ATTACHED TG A SEWHNG MAQHTNE Marcel Fresard, Geneva, and Fred Butcher, .lussy, Geneva,

Switzerland, assignors to Mefina S.A., Frihcurg, Switzeriand, a corporation of Switzerland Filed Get. 22, 1962, Ser. No. 232,168 Claims priority, application Switzerland, Get. 25, 1961, 12 ,4-29/ 61 8 Qiaims. (Cl. 112--1tl2) The present invention concerns an embroidery appliance for sewing machines comprising a support frame for the piece to be embroidered, this frame being guided so as to be capable of being displaced in two mutually perpendicular directions subject to the action of two mechanisms each comprising a tappet or follower of the profile of an element constituting a pattern of the embroidery stitches to be sewn.

Various embroidery appliances are known operating on the above principles. However, in all the known appliances of this kind the tappets intended to follow the profile of the pattern which may be constituted by a cam, a control bar or other device remain constantly in contact with its profiles. The result of this on the one hand is that both the tappets and the profiles wear out as a result of their mutual displacement. On the other hand, these known mechanisms are inconvenient because a large clearance is necessary between two adjacent stitches since the inclination which is possible to give to the profiles between two stitches is necessarily limited in pitch. This is so, because a wide spacing would necessitate the formation of a very sharp curve on the cam or control pattern member. Mechanically the slope of such a curve is limited and cannot exceed a certain degree of inclination.

The object of the present invention is to provide an embroidery appliance in which the above-mentioned inconveniences are eliminated.

According to the present invention each of the mechanisms of control of the frame comprises a device for transmission between the respective tappets and the frame capable of being made alternately active for rigidly transmitting to the frame the position given to the tappet by the profile of the pattern and being inoperative for making the position of the tappet independent of the position of the frame, by permitting the retraction of the tappet from the profile of the pattern, a locking device fixing the frame in position when the transmission devices are inoperative.

The invention will be described further, by way of example, with reference to the accompanying drawings, in

which:

FIG. 1 is a plan showing a first embodiment of embroidery appliance in accordance with the invention, the tappets being in a position retracted from the pattern.

FIG. 2 is a section taken on a line IIl'I of FIG. 1;

FIG. 3 is a transverse section taken on the line III-Ill of FIG. 1;

FIG. 4 is a plan view similar to that of FIG. 1 showing the tappets in contact with the pattern;

FIG. 5 is a section taken on the line VV of FIG. 4;

FIG. 6 is a transverse section taken on the line VI-VI of FIG. 4;

FIG. 7 is a plan view of a second embodiment of an embroidery appliance in accordance with the invention in the position in which the tappets are retracted from the pattern;

FIG. 8 is a view similar to that of FIG. 7 but showing the tappets in the position in contact with the pattern;

FIG. 9 is a longitudinal section taken on the line IXIX of FIG. 8;

FIG. 10 is a transverse section taken on the line XX of FIG. 8; and

dddsfib i Patented Feb. .2, 1965 "ice FIG. 11 is a perspective view of one or other of the illustrated embodiments of the embroidery appliance, shown on a sewing machine.

Referring to FIGS. 1 to 6, the embroidery appliance which is illustrated comprises a frame I intended to receive the pieces to be embroidered to (shown in FIG. 11). This support frame for the embroidery pieces is guided so as to be capable of displacement in two mutually perpendicular directions. For this purpose the frame 1 is engaged on a spindle 5 by way of two lugs 3, 4 formed integrally with the frame; these lugs can thus slide transversally with respect to the free arm 6 (FIGS. 10 and 11) of the sewing machine. This spindle 5 is carried by a support 7 which also carries spindle 8 perpendicular to the spindle 5. This spindle 8 is adapted to slide into two bearings 9 integral with the base plate 10 of the appliance. The support 7 can then slide in the longitudinal direction with reference to the sewing machine arm 6 due toits spindle 8 being engaged in the bearings 9. Springs 11, 12 engaged on the spindles 5, 8 respectively, tend to retain the frame 1 in a fixed position of rest.

Two mechanisms are provided for causing the displacements of the frame 1 in the two perpendicular directions initiated by a pattern, constituted in the present case by a pattern bar 13 presenting two profiles 14, 15. Each of these mechanisms comprises a tappet 16 or 17, designed to come into contact with the profiles 14, 15 respectively of the pattern bar 13. Each of the two mechanisms comprises a transmission device between the tappet 16 or 17 and the frame 1, this transmission device being adapted to be rendered active for rigidly transmitting to the frame 1 the position given to the tappets 16 and 17 respectively, by the profile 14 or 15 respectively, and to be rendered inoperative for making the position of the tappets 16, 17 as the case may be independent of the position of the frame 1. These transmission devices moreover each include a block 18 capable of sliding in a slideway 19 carried by the base plate 10. A link 21 is pivotally connected at 20 to each block 18 and this link 21 is pivoted at 22 to a second link 23 connected by a pivot 24 to another block 25. Each pair of links 21 and 23 constitutes a knuckle joint interposed between the blocks 18 and 25. A member 26 presenting an elongated aperture 27 is disposed between the two knuckle joints 21, 23 of the two transmission devices; the aperture 27 is ngaged on a pin 28 fixed to the base plate 10. This member 26 also presents a slot 29 in which the adjacent ends of the pivots 22 of the two knuckle joints are engaged. This member 26 forms part of a reciprocatory mechanism causing successive straightening and bending of the two knuckle joints 21, 23 in such a way as to render active or inoperative the transmission of movement between the tappets 16, 17 respectively and the frame 1. This slide mechanism will be described in further detail below.

The transmission of the movements of the blocks to the frame '1 is effected in the following manner.

The upper block 25 (see FIG. 5) carries a pin 30 engaging in a forked end 31 of a bellcrank lever 32 pivoting at 33 ion the base plate 10. The other end 34 of this lever acts against an extension of the lug 3 to impart to the frame .1 transverse movements with reference to the arm 6 of the sewing machine.

The lower block 25 is connected directly by a screw 35 to the support 7 for transmitting to the same, and thus also to the frame 1, movements in the longitudinal direction with reference to the arm 6 of the sewing machine.

A locking device enables the frame 1 to be fixed in an inoperative position. That is to say, the locking device retains the frame in position provided a force greater than the force of the springs 11 and 12 is not exerted thereon. The locking device comprises a brake acting on '3 the transmission members between the knuckle joints 21, 23 and the frame 1. These transmission members are constituted by the blocks 25. The brake includes a friction shoe 36 guided in a slideway 37 integral with the base plate 10. The shoe 36 is subject to the action of a lever 38 swing'able about a pivot '39. The lever 38 is subject to the action of a return spring 40 tending to cause it to pivot in an anti-clockwise direction with reference to FIG. 1, in such a way that the end 41 of the lever 38 is always maintained in contact with a cam 42; this cam 42, is integral with a single camshaft 43 extending under the base plate to be operatively driven by the motor mechanism of the sewing machine. This camshaft 43 carries a second cam 44, of generally triangular shape engaging in aperture 45 having parallel-faces presented by .a lever 46' oscillating about a pivot 47 fixed to the plate 10. This lever 46' carries a pivot spindle 48 by which it is pivotally connected to the member 26 of theslide mechanism referred to above. The oscillatory movements transmitted to the lever 46 by the cam 44 cause movements of transverse dis-- placement of the member 26 guided by the pin 23. Each of these transverse movements at the end of a stroke in' one direction causes the knuckle joints 21, 23. to, be

straightened, in the course of which movement the tappets 16, .17 respectively are brought into contact with the profiles 14, I '15 respectively of the pattern bar 13. Movements of the member 26 in the opposite direction cause the knuckle joints 21, 2.3 to bend, int-he course of which'rnovement the tappets 16', 17 respectively are made to retract from the pattern bar 13'.

A third cam 49 is fixed on the camshaft 43'. This cam 49 acts against the end 50 of a lever 51 swingable about a. pivot 52 fired to the base plate 10. The other end 53'of this lever 51 carries'a pan/1'54 pivoted thereon. Thepawl 54 is engaged against a saw-toothed rack 55 provided on the rear of the pattern bar 13. The .pawlg5'4' is subject to the action of a return spring 56 urging it in the rearward direction which thus ensures that the end 50 of the lever 51 is maintained in contact with the,cam;49.,,

I he operation of the embroidery ap liance; described above with reference to FIGS. '1' to 6 is as -follows:

Assuming that thisapplia'nce is mounted on the sewing.

machine arm 6 and that its single camshaft 43 is at the same time connected to the general mechanism of th sewing machine, this appliance is used in thefoll' owing.

After having placedthe pieces 2' Which'are to boom broidered in the frame linthe usual known manner, with the assistance of an elastic'piping bandfo'r example, the.-

pattern bar 13} is introduced transversely in the slideway 57 situated for this purpose transversely of the housing 58 of the appliance. This pattern bar 13 is pushe'dinto' the slideway 57 until a springretention pawl'59 is. engaged against the first tooth of a rack" 55; Care should be'taken before thus inserting the pattern bar 13 that the tappets' '16 and \17 are in a retracted position. The equipment is then ready for sewing the first embroidery point. As soon as the sewing machine is started, rotation of the camshaft 43 successively causes:

(a) An advance of one tooth 55 of the pattern bar 13.

by the cam 49 acting on the operating lever 51 of the pawl 54;

(b) The brake shoe 36 to be released by the lever 38 actuated by the cam 42 which frees the blocks 2-5;

(c) The member-'26 which was in the position shown in FIG. 1 to be displaced by the cam 44 and the lever 46 to be brought into theposition illustrated in FIG. 4, which causes the knuckle joints 21, 23 tobe straightened and brings the tappets 16 and '17 into contact with the profiles 114, '15, respectively, of the pattern bar 13, at

thi instant in the operative cycle the frame 1 being brought into a position determined by the profiles 14 and 15 of the pattern bar 13;

-(d) The brake to be put on again to ensure the position imparted to the frame 1, which is effected by dis causing the knuckle joints 21, 23' to' bend and the tappets 16, '17, respectively, to retract;

(g) The cam 49 to effect a fresh advance of one tooth of the pattern bar 13, through the intermediary of the lever 51 and of the pawl 54, after which the cycle begins again.

The second form of construction of the embroidery appliance shown in FIGS. 7 to 10,likewis'e comprises a frame 1 slidably connected by lugs 3 and 4to spindle 5 carried by a support 7. Thistsupport 7 similarly carries a spindle 8 adapted to slide in bearings 9 carried by a base plate 19. A spring 11 engages around the spindle 5 and likewise a spring 12 engages around the spindle 3, these two springs tending to bring; the frame back into a fixed resting position.

The positions of the frame 1 are likewise dependent upon the shape oftheprofiles 14 and 15 0f a pattern bar 13 engaged transversely in a slideway 57 of the housing 58-of the appliance.- 1 The mechanism of the appliance is driven by a similar camshaft 43 extending through the base plate 10 of the appliance. V 7

FIG. 10 illustrates one example of the possible connection of this camshaft 43 to the motor mechanism of the sewing machine. In this FIG. 10 there is shown in section the free lower arm 6 of a sewing machineyin the interior of the arm 6 therecan be seen a horizontal drive shaft 60 for the shuttle mechanism, or as the case may be, for the. usual feed mechanism'for the pieces to be" sewn on the machine. A tangential screw or worm 61 integral with the shaft 60 is in driving engagement with a toothed Whflfil' 62twhich in turn is indriving'engagement with a wheel 63 integralwith a spindle 64. The camshaft 43 of the appliance is arranged to coincide with this spindle 64 whenthe'appl-iance is-put in-place on'the sewing machine. Thecoupling of the spindle 64 tothe camshaft 43 can be etfectedby any known means of rapid: coupling.

in the illustrated example the spindle 64 has an eccentric hole 65'within which a pin 66 is slidable subject to the action of a spring 67. This pin; 66 is designed to engage in a hole 68 having a corresponding eccentricity arranged in the driving shaft 43; Thus the coupling between the spindleand the camshafts .64, 43can only be effected in one predetermined angular position.

7 In thissecond form of construction the positions impartedto the frame 1 as'a function of the profiles 14 and 15 of the pattern bar 13, are given to it through the intermediary of mechanisms comprising a rod 69, 70, respectively, disposed between'thetappets 16, 17, respectively, and the lever 32a or the support 7 respectively. ,In operation, as in the first form of construction, the tappet 16 designed to'impart the transverse positions to the frame 1 with reference to the sewing machine arm 6 acts on the frame lug 3 through the intermediary of a lever 32a piv oted' atf33; in the housing 58, after which the tappe't 17 transmits the longitudinal positionsto the frame l'through the intermediary'of the r0d'70 acting directly against the support 7.

These rods 69 and 70 are formed in two sections adapted to slide relative to one'another. The rod 69 comprises afirst section 71 carrying the tappet 16'. This section slides in a cylindrical bore 72 of the housing 58; The second section of the rod 69 is constituted by a piston or plunger 73sliding in; a cylindrical guide' 74 integral with the housing 58. This plunger 73 carries an'extension 75 of reduced section which engages in a bore 76 having a section corresponding to the section 71. A spring 77 is engaged around this extension 75. The length of the spring 77 is designed so that in its relaxed'condition this spring determines the total effective length of the rod 69 which is of telescopic construction. Each of sections 71 of the rods 69, 70 has a projection 78 (see FIGS. 9 and 10) on its lower portion. A member 79 is designed to come in contact with the two projections 78 during the phase in which the tappets 16 and 17 are retracted from the profiles 14 and 15. This member '79 is articulated at 81, 81 by two links 80 to the housing 58 so as to define therewith a formable parallelogram.

As in the first form of construction the single camshaft 43 carries a first cam 42: designed to act on a brake composed of two shoes 36a, 36b. These shoes act on the plungers 73 of the rods 69, 79, respectively. This brake comprises a lever 38 pivoted at 82 on a member 83 adapted to slide transversely in a passage 84 disposed in a boss 85 of the housing 58. This member 83 has a lateral extension 85 designed to act on the shoe Sela. The lever 38 carries at one of its ends a screw 87 forming a controllable abutment by means of which it acts against the shoe 36a. The other end of the lever 38 is designed to follow the profile of the cam 42. The articulated arrangement of the lever 38 on the slidable member 83 ensures that the braking efforts of the shoes 36a and 3612 are balanced on the plungers 73 of the rods 69, '70, respectively.

The second cam 44 integral with the camshaft 43 acts on an arm 88 oscillating about a pivot 89 integral with the housing 58. The end 91) of this arm 88 acts against the member 79 for causing the tappets 16 and 17 to be brought into the position in which they are retracted from the profiles 14 and (see FIG. 7) and for causing the said tappets to enter into contact with the said profiles.

The third cam 49 which is carried by the camshaft 43 acts as in the fi st form of construction on the end 50 of the lever 51 pivoting at 52 on the housing of the appliance. The end 53 of this lever carries a pawl 54 for feeding the pattern bar 13 by engagement in a rack 55 disposed at the back of this pattern bar. A return spring 56 tends to pull the pawl back and thus ensures the end 50 of the lever 51 being maintained against the cam 49. A re taining pawl 59 constituted by a simple plate spring is likewise provided for co-operating with the rack 55 and ensuring that the pattern bar 13 is kept in position.

The operation of this latter form of construction of the embroidery appliance takes place in the following manner:

Assuming the appliance to be mounted on the free arm or on the base of a sewing machine as shown in FIGS. 10 and 11 and a piece of fabric to have been clamped in the frame 1, the pattern bar 13 is engaged in the aperture 57 of the housing 53 until the first tooth of the rack 55 enters into contact with the pawl 54. Care should be taken before inserting the pattern bar that the tappets 16 and 17 are in the retracted position as shown in FIG. 7. In this position the shoes 36a and 36b lock the plungers 73. After starting the sewing machine the successive phases of operation of the appliance are then as follows:

(a) The cam 49 causes an advance of one tooth of the pattern bar 13 through the intermediary of the lever 51 and the pawl 54;

(b) The cam 42 having rotated through a certain angle causes the release of the brake by disengagement of the shoes 36a, 36b;

(0) The cam 44 acting on the arm 88 causes the member 79 to be displaced to the right with reference to FIGS. 7 and 8, this member 79 releasing the sections 71, the rods 69 and 70 again assuming their maximum extension subject to the action of the spring 77 and the tappets 16 and 17 enter into contact with the profiles 14 and 15, the pattern bar 13 being of course stationary during this phase of operation;

(d) The tappets 16 and 17 having defined the position to impart to the frame 1, the brake is put on again by the cam 42 acting on the lever 38 and the shoes 36a, 36b;

(e) The frame 1 being stationary the sewing machine pierces one point of embroidery;

(j) The cam 44 causes an angular displacement in the counter clockwise direction of the arm 88 producing a displacement towards the left of the member 79, the tappets 16 and 17 being thereby withdrawn from the profiles 14 and 15, compressing the springs 77 of the rods 69 and 7d, the brakes 36a, 36b obviously staying locked during this movement;

(g) The cam 49 causes a fresh advancing movement of one tooth of the pattern bar 13 through the intermediary of the lever 51 and of the pawl 54 and the cycle begins again.

The preceding description of the two forms of construction shown in the drawings of this embroidery appliance illustrates the great advantages which this provides due to the withdrawal of the tappets 16 and 17 after sewing each point of the embroidery. It is to be understood without more ado that the successive retraction and advance movements of the tappets 16 and 17 enable the profiles 14 and 15 to be given successive displacements of an amplitude which would be impossible to etfect with a tappet continuously in contact against these profiles. It is possible without more ado as has been shown in FIGS. 1 and 4 to shape the profiles 14 and 15 in steps or in successive levels of heights which can be very different from one level to the other.

The length of the pattern bar 13 is used to the maximum because each point of the profile remote from the thickness of one tappet may be utilised to impart new coordinates to the frame 1. Vice versa each design of embroidery imparted by one pattern bar can be formed on a relatively short length thereof.

Numerous modifications of the forms of construction referred to above are conceivable. Thus instead of using patterns in the form of pattern bars, discs may be used which are driven in an intermittent angular movement. In place of a single pattern bar 13 one bar can also be used for each profile 14 or 15, respectively, and it is possible to cause two pattern bars to be displaced simultaneously across the appliance.

The length of the pattern bars may vary according to the embroidery design desired and these rules may, depending upon their length, be in the form of bands which are more or less flexible, for example of steel or of a plastic material which is moulded or pressed.

We claim:

1. In an embroidery appliance adapted to be attached to a sewing machine and including a work-piece supportting frame guided for displacement relative to the sewing machine in two directions at right angles to each other, a pattern bar presenting two profiles each shaped as a function of one coordinate of an embroidery pattern, and two mechanisms each having a tappet engageable with one pattern bar profile for effecting frame displacements to positions prescribed by the pattern bar; the improvement comprising a transmission device for each of said two mechanisms disposed between each tappet and the frame, means alternately transmitting to the frame the position given to each tappet by the profile of the related pattern bar and retracting the tappet from the profile of the related pattern bar independently of the position of the frame, and brake means for locking the transmitting means during the time intervals when the tappets are out of engagement with the profiles of the pattern bar.

2. An embroidery appliance as defined in claim 1, wherein said transmission device includes a first pair of slidably mounted blocks each having a tappet secured thereto, a second pair of slidably mounted blocks, knuckle joints connecting each of the blocks of the first pair of blocks with a related block of the second pair of blocks, means connecting each of said second pair of blocks to the frame whereby displacement of one of said blocks effects displacement of the frame in one direction and displacement of the other block effects displacement of the frame in the other said direction, whereby when saidv knuckle joints are straight they transmit tappet displacements to the frame through said blocks and when bent, retract the tappets from the profile of the related pattern bar independently of the position of the frame.

3. An embroidery appliance as defined in claim 1, ineluding a single camshaft adapted to be driven in synchronism with the sewing machine, a first cam fixed on the camshaft for causing actuation of said brake means, a second cam fixed on the camshaft for causing actuation of said transmission devices, and a third cam fixed on the camshaft for intermittently causing feeding of said'pattern bar while the tappets are retracted therefrom.

4. An embroidery appliance as defined in claim 1, wherein said transmission device includes, a pair of rods, oppositely disposed slidable members able members from each other, the slidable member at one end of each of said rods-having a tappet secured there-' to, the slidable members at the other ends of said rods acting on said frame'to effect displacement thereof in two directions at right angles to'each other. I

5. An' embroidery appliance for attachment to a sewing machine having an arm and rotary mechanism within said arm, said appliance comprising a housing, a camshaft journalled in and extending through said housing, means for detachably coupling said camshaft in a predetermined angular relative position to said rotary mechanism, a workpiece supporting frame mounted for displacements in two mutually perpendicular directions relative to said housing, brake means for locking the frameiin its position relative to said housing, a first cam fixed on said camshaft and adapted to periodically actuate said brake means, a pattern bar presenting profiles for defining an embroidery pattern mounted in said housing so asto be displaceable relative thereto, two tappets each displaceable relative to the housing. into contact with the pattern bar profiles, means for transmitting to the frame in said two' directions respectively displacements corresponding to respective,

tappet positions when in contact with the pattern bar profiles, and retracting the tappets from the profile of the related pattern bar independently of the position of the frame, a second cam fixed on said camshaft and adapted telescopically mounted on said rods and spring means spacing said slidto periodically actuate said transmitting means and displace said tappets, mean s for effecting stepwise displacement of the pattern bar, and a third cam filed on said camshaft and adapted to periodically actuate said pattern bar displacement means.

.loaded telescopic rods each comprising two relatively displaceable sections and a spring urging said sections into a predetermined relative position.

8. In a sewing machine having an arm, an embroidery appliance comprising a frame for supporting a workpiece mounted for displacement in two mutually perpendicular directions relative to the sewing machine arm, pattern means presenting profiles as a function of an embroidery p'attern and' being displaceably mounted relative to said arm, tappet means displaceable relative to said arm for contacting said pattern means and assuming positions defined by the profiles thereof, transmission means for imparting positions to the frame responsive to positions of said tappet means, braking means for successively locking and releasing the frame in its position relative to said arm, means for selectively, retracting said tappet means from said pattern means whilst rendering the transmission means inoperative, feeding means for eifecting stepwise displacements. of the pattern means, and control means for actuating in mutually timed relationship said braking means and said tappet means retracting means and said feeding means, whereby, during displacement of the pattern means the tappet means is retracted therefrom independently of the position of the frame.

References-Cited by the Examiner UNETED STATES PATENTS 1,575,285 3/26 Sibbald et al 112-102 1,626,256 4/27 Schwarzmann ll2102 2,684,041 7/54 Tice l12l03 X JORDAN FRANKLIN, Primary Examiner. DAVID J. WILLIAMOWSKY, Examiner. 

1. IN AN EMBROIDERY APPLIANCE ADAPTED TO BE ATTACHED TO A SEWING MACHINE AND INCLUDING A WORK-PIECE SUPPORTTING FRAME GUIDED FOR DISPLACEMENT RELATIVE TO THE SEWING MACHINE IN TWO DIRECTIONS AT RIGHT ANGLES TO EACH OTHER, A PATTERN BAR PRESENTING TWO PROFILES EACH SHAPED AS A FUNCTION OF ONE COORDINATE OF AN EMBROIDERY PATTERN, AND TWO MECHANISMS EACH HAVING A TAPPET ENGAGEABLE WITH ONE PATTERN BAR PROFILE FOR EFFECTING FRAME DISPLACEMENTS TO POSITIONS PRESCRIBED BY THE PATTERN BAR; THE IMPROVEMENT COMPRISING A TRANSMISSION DEVICE FOR EACH OF SAID TWO MECHANISMS DISPOSED BETWEEN EACH TAPPET AND THE FRAME, MEANS ALTERNATELY TRANSMITTING TO THE FRAME THE POSITION GIVEN TO EACH TAPPET BY THE PROFILE OF THE RELATED PATTERN BAR AND RETRACTING THE TAPPET FROM THE PROFILE OF THE RELATED PATTERN BAR INDEPENDENTLY OF THE POSITION OF THE FRAME, AND BRAKE MEANS FOR LOCKING THE TRANSMITTING MEANS DURING THE TIME INTERVALS WHEN THE TAPPETS ARE OUT OF ENGAGEMENT WITH THE PROFILES OF THE PATTERN BAR. 